You can use a 204, install in a small NEMA enclosure, plumb with bulkhead connectors the ethernet and two RP-SMA cables, and you can get more or less close to the protection needed for the pool (thermal is usually an issue outdoor, but not indoors). Cost would be around an additional $300-400 all in with installation. If done right though, it will protect your AP from water splashing, when it gets hosed down, and from constant exposure to chlorine gas.